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Preposition after adjective

Contingent on or contingent upon?

Both contingent on and contingent upon are correct. Upon is more formal.

Quick answer

Which form should you use?

Use contingent on in most everyday and professional writing. Contingent upon has the same meaning but sounds more formal.

Approval is contingent on funding.
The deal is contingent upon legal review.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
contingent on + condition

Showing dependency on a condition

Use on for conditions, requirements, or future events.

Success is contingent on teamwork.
2
contingent upon + condition

Formal alternative

Upon has the same meaning as on but sounds more formal or legal.

Payment is contingent upon delivery.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
contingent on
The project is contingent on approval.
dependent on a condition
contingent upon
Release is contingent upon inspection.
same meaning, more formal

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using contingent without a clear condition

The adjective normally needs a condition or dependency.

✓ The agreement is contingent on final approval.

Choosing upon in very informal writing

Upon is correct but may sound overly formal in casual contexts.

✓ Our plans are contingent on the weather.

Quick practice

Choose the expression that matches the intended meaning.

1. The offer is contingent ___ a background check.
2. The contract is contingent ___ regulatory approval.
3. Which form is more formal?

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Frequently asked questions

Do on and upon mean the same thing here?

Yes. The difference is mainly in style and formality.

Is contingent on common in business English?

Yes. It is widely used in contracts, planning, and negotiations.

Can contingent describe a group of people?

Yes. As a noun, a contingent can mean a group representing an organisation or country.

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